Johannes Weiner 23751be009 memcg: fix hierarchical oom locking ... Commit 79dfdaccd1 ("memcg: make oom_lock 0 and 1 based rather than counter") tried to oom lock the hierarchy and roll back upon encountering an already locked memcg. The code is confused when it comes to detecting a locked memcg, though, so it would fail and rollback after locking one memcg and encountering an unlocked second one. The result is that oom-locking hierarchies fails unconditionally and that every oom killer invocation simply goes to sleep on the oom waitqueue forever. The tasks practically hang forever without anyone intervening, possibly holding locks that trip up unrelated tasks, too. Signed-off-by: Johannes Weiner <jweiner@redhat.com> Acked-by: Michal Hocko <mhocko@suse.cz> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2011-08-25 16:25:34 -07:00
..
backing-dev.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback	2011-07-26 10:39:54 -07:00
bootmem.c	crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn	2011-03-23 19:47:19 -07:00
bounce.c	bounce: call flush_dcache_page() after bounce_copy_vec()	2010-09-09 18:57:25 -07:00
cleancache.c	mm: cleancache core ops functions and config	2011-05-26 10:01:36 -06:00
compaction.c	mm: compaction: abort compaction if too many pages are isolated and caller is asynchronous V2	2011-06-15 20:04:02 -07:00
debug-pagealloc.c	generic debug pagealloc	2009-04-01 08:59:13 -07:00
dmapool.c	devres: fix possible use after free	2011-07-25 20:57:14 -07:00
fadvise.c	readahead: introduce FMODE_RANDOM for POSIX_FADV_RANDOM	2010-03-06 11:26:25 -08:00
failslab.c	fault-injection: add ability to export fault_attr in arbitrary directory	2011-08-03 14:25:20 -10:00
filemap_xip.c	mm: Convert i_mmap_lock to a mutex	2011-05-25 08:39:18 -07:00
filemap.c	mm: clarify the radix_tree exceptional cases	2011-08-03 14:25:24 -10:00
fremap.c	mm: don't access vm_flags as 'int'	2011-05-26 09:20:31 -07:00
highmem.c	mm: make HASHED_PAGE_VIRTUAL page_address' struct page argument const.	2011-08-17 13:00:20 -07:00
huge_memory.c	mm/huge_memory.c: minor lock simplification in __khugepaged_exit	2011-07-25 20:57:09 -07:00
hugetlb.c	mm: hugetlb: fix coding style issues	2011-07-25 20:57:09 -07:00
hwpoison-inject.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
init-mm.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
internal.h	mm: nommu: sort mm->mmap list properly	2011-05-25 08:39:05 -07:00
Kconfig	mm Kconfig typo: cleancacne -> cleancache	2011-06-10 14:47:52 +02:00
Kconfig.debug	mm: debug-pagealloc: fix kconfig dependency warning	2011-03-22 17:44:02 -07:00
kmemcheck.c	kmemcheck: Fix build errors due to missing slab.h	2010-03-30 22:02:32 +09:00
kmemleak-test.c	kmemleak: remove memset by using kzalloc	2011-01-27 18:31:51 +00:00
kmemleak.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
ksm.c	ksm: fix NULL pointer dereference in scan_get_next_rmap_item()	2011-06-15 20:04:02 -07:00
maccess.c	maccess,probe_kernel: Make write/read src const void *	2011-05-25 19:56:23 -04:00
madvise.c	fs: kill i_alloc_sem	2011-07-20 20:47:46 -04:00
Makefile	mm: cleancache core ops functions and config	2011-05-26 10:01:36 -06:00
memblock.c	mm/memblock.c: avoid abuse of RED_INACTIVE	2011-07-25 20:57:09 -07:00
memcontrol.c	memcg: fix hierarchical oom locking	2011-08-25 16:25:34 -07:00
memory_hotplug.c	mm: extend memory hotplug API to allow memory hotplug in virtual machines	2011-07-25 20:57:08 -07:00
memory-failure.c	HWPoison: add memory_failure_queue()	2011-08-03 11:15:58 -04:00
memory.c	mm/futex: fix futex writes on archs with SW tracking of dirty & young	2011-07-25 20:57:11 -07:00
mempolicy.c	cpusets: randomize node rotor used in cpuset_mem_spread_node()	2011-07-26 16:49:43 -07:00
mempool.c	mm: remove broken 'kzalloc' mempool	2009-09-22 07:17:35 -07:00
migrate.c	migrate: don't account swapcache as shmem	2011-06-16 15:01:24 -07:00
mincore.c	mm: clarify the radix_tree exceptional cases	2011-08-03 14:25:24 -10:00
mlock.c	mm: don't access vm_flags as 'int'	2011-05-26 09:20:31 -07:00
mm_init.c	mm: mminit_loglevel cannot be __meminitdata anymore	2008-08-20 15:40:30 -07:00
mmap.c	mmap: fix and tidy up overcommit page arithmetic	2011-07-25 20:57:09 -07:00
mmu_context.c	exit: fix oops in sync_mm_rss	2010-03-24 16:31:21 -07:00
mmu_notifier.c	thp: mmu_notifier_test_young	2011-01-13 17:32:46 -08:00
mmzone.c	mm: page allocator: adjust the per-cpu counter threshold when memory is low	2011-01-13 17:32:31 -08:00
mprotect.c	thp: mprotect: transparent huge page support	2011-01-13 17:32:44 -08:00
mremap.c	mm: Convert i_mmap_lock to a mutex	2011-05-25 08:39:18 -07:00
msync.c	sanitize vfs_fsync calling conventions	2010-05-21 18:31:21 -04:00
nobootmem.c	memblock/nobootmem: remove unneeded code from alloc_bootmem_node_high()	2011-05-25 08:39:31 -07:00
nommu.c	mmap: fix and tidy up overcommit page arithmetic	2011-07-25 20:57:09 -07:00
oom_kill.c	oom: task->mm == NULL doesn't mean the memory was freed	2011-08-01 15:24:12 -10:00
page_alloc.c	fault-injection: add ability to export fault_attr in arbitrary directory	2011-08-03 14:25:20 -10:00
page_cgroup.c	mm/page_cgroup.c: simplify code by using SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macros	2011-07-25 20:57:09 -07:00
page_io.c	block: kill off REQ_UNPLUG	2011-03-10 08:52:27 +01:00
page_isolation.c	mm: page_isolation: codeclean fix comment and rm unneeded val init	2010-10-26 16:52:11 -07:00
page-writeback.c	squeeze max-pause area and drop pass-good area	2011-08-19 22:42:07 +08:00
pagewalk.c	pagewalk: fix code comment for THP	2011-07-25 20:57:09 -07:00
percpu-km.c	percpu: clear memory allocated with the km allocator	2010-10-02 10:28:42 +03:00
percpu-vm.c	mm: remove gfp mask from pcpu_get_vm_areas	2011-01-13 17:32:34 -08:00
percpu.c	Merge branch 'for-2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2011-05-24 11:53:42 -07:00
pgtable-generic.c	mm/pgtable-generic.c: fix CONFIG_SWAP=n build	2011-01-26 10:49:58 +10:00
prio_tree.c	sanitize <linux/prefetch.h> usage	2011-05-20 12:50:29 -07:00
quicklist.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
readahead.c	readahead: readahead page allocations are OK to fail	2011-05-25 08:39:25 -07:00
rmap.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback	2011-07-26 10:39:54 -07:00
shmem.c	mm: clarify the radix_tree exceptional cases	2011-08-03 14:25:24 -10:00
slab.c	slab, lockdep: Annotate the locks before using them	2011-08-04 10:18:00 +02:00
slob.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
slub.c	slub: Fix partial count comparison confusion	2011-08-09 21:12:31 +03:00
sparse-vmemmap.c	tree-wide: fix comment/printk typos	2010-11-01 15:38:34 -04:00
sparse.c	mm: make some struct page's const	2011-07-25 20:57:07 -07:00
swap_state.c	block: remove per-queue plugging	2011-03-10 08:52:07 +01:00
swap.c	mm: batch activate_page() to reduce lock contention	2011-05-25 08:39:37 -07:00
swapfile.c	mm: let swap use exceptional entries	2011-08-03 14:25:22 -10:00
thrash.c	mm: swap-token: add a comment for priority aging	2011-07-25 20:57:08 -07:00
truncate.c	mm: a few small updates for radix-swap	2011-08-03 14:25:24 -10:00
util.c	mm: nommu: sort mm->mmap list properly	2011-05-25 08:39:05 -07:00
vmalloc.c	mm: fix wrong vmap address calculations with odd NR_CPUS values	2011-08-14 12:32:52 -07:00
vmscan.c	vmscan: clear ZONE_CONGESTED for zone with good watermark	2011-08-25 16:25:34 -07:00
vmstat.c	mm, mem-hotplug: update pcp->stat_threshold when memory hotplug occur	2011-05-25 08:39:09 -07:00